The exquisite structure of proteins allows them to perform complex tasks,
from managing chemical reactions to building intricate communications networks
that put the Web to shame. But if these smart molecules become defective, the
results c

Ehsan Masood talks to Stuart Kauffman, one of a pioneering
generation of complexity theorists who struggled to define life in
terms of advanced mathematics. Fifteen years on, his new book Investigations
makes it clear that there m